package com.xunmeng.framework.interceptor.impl;

import com.alibaba.fastjson2.JSON;
import com.xunmeng.common.annotation.RepeatSubmit;
import com.xunmeng.common.constant.CacheConstants;
import com.xunmeng.common.core.redis.RedisCache;
import com.xunmeng.common.filter.RepeatedlyRequestWrapper;
import com.xunmeng.common.utils.StringUtils;
import com.xunmeng.common.utils.http.HttpHelper;
import com.xunmeng.framework.interceptor.RepeatSubmitInterceptor;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.beans.factory.annotation.Value;
import org.springframework.stereotype.Component;

import javax.servlet.http.HttpServletRequest;
import java.util.HashMap;
import java.util.Map;
import java.util.concurrent.TimeUnit;

@Component
public class SameUrlDataInterceptor extends RepeatSubmitInterceptor {
    public final String REPEAT_PARAMS="repeatParams";
    public final String REPEAT_TIME = "repeatTime";
    // 令牌自定义标识
    @Value("${token.header}")
    private String header;

    @Autowired
    private RedisCache redisCache;

    @Override
    public boolean isRepeatSubmit(HttpServletRequest request, RepeatSubmit annotation) {
        String nowParams="";
        if (request instanceof RepeatedlyRequestWrapper){
            RepeatedlyRequestWrapper repeatedlyRequestWrapper=(RepeatedlyRequestWrapper) request;
            nowParams= HttpHelper.getBodyString(repeatedlyRequestWrapper);
        }
        // body为空，获取Parameter的数据
        if (StringUtils.isEmpty(nowParams)){
            nowParams= JSON.toJSONString(request.getParameterMap());
        }

        Map<String, Object> nowDataMap = new HashMap<String, Object>();
        nowDataMap.put(REPEAT_PARAMS, nowParams);
        nowDataMap.put(REPEAT_TIME,System.currentTimeMillis());
        // 请求地址（作为存放cache的key值）
        String url = request.getRequestURI();

        // 唯一值（没有消息头则使用请求地址）
        String submitKey = StringUtils.trimToEmpty(request.getHeader(header));
        
        //唯一标识（指定key+url+消息头）
        String cacheRepeatKey= CacheConstants.REPEAT_SUBMIT_KEY+url+submitKey;
        
        Object sessionObj=redisCache.getCacheObject(cacheRepeatKey);
        
        if (sessionObj !=null){
            Map<String,Object> sessionMap=(Map<String, Object>) sessionObj;
            if (sessionMap.containsKey(url)){
                Map<String, Object> preDataMap = (Map<String, Object>) sessionMap.get(url);
                if (compareParams(nowDataMap,preDataMap) && compareTime(nowDataMap,preDataMap,annotation.interval())){
                    return true;
                }
            }
        }
        Map<String, Object> cacheMap = new HashMap<String, Object>();
        cacheMap.put(url, nowDataMap);
        redisCache.setCacheObject(cacheRepeatKey,cacheMap,annotation.interval(), TimeUnit.MILLISECONDS);
        return false;
    }

    /**
     * 判断参数是否相同
     */
    private boolean compareParams(Map<String, Object> nowMap, Map<String, Object> preMap){
        String nowParams = (String) nowMap.get(REPEAT_PARAMS);
        String preParams = (String) preMap.get(REPEAT_PARAMS);
        return nowParams.equals(preParams);
    }
    /**
     * 判断两次间隔时间
     */
    private boolean compareTime(Map<String,Object> nowMap,Map<String,Object> preMap,int interval){
        long time1=(Long) nowMap.get(REPEAT_TIME);
        long time2=(Long) preMap.get(REPEAT_TIME);
        if ((time1-time2)<interval){
            return true;
        }
        return false;
    }
}
